VMware vSphere High Availability

vSphere HA is a recommended low-cost ESX’s feature that monitors virtual machines in a resource pool and detects downtime. In cases of downtimes, it powers on the virtual machines using resources on another host within the same cluster. The powering on is possible since the virtual machine disk (VMDK) are all kept within a [...]

5 Benefits of Performing Security Audits on Your Servers

Past December, South Korea-based Cryptocurrency exchange Youbit shut down its door after it was hit by a cyber-attack (for the second time in 8 months). Only a week back, a Japanese Cryptocurrency exchange Coincheck was hacked, costing it more than $534 million. These instances of cyber-terrorism are not just limited to the crypto-community. The number [...]

2018-04-06T17:26:48+05:30March 13th, 2018|Server Administration, Server Security|0 Comments

Staying Safe and Secure in Amazon AWS

You're probably familiar with this icon and see it a lot these days. After all, it's one of the most trending things in business circles today. In case you're among the minority and have no idea about what the icon represents then here's a bit of useful information for you. The above icon is an [...]

2017-10-10T10:47:32+05:30September 23rd, 2017|Server Administration, Server Security|Comments Off on Staying Safe and Secure in Amazon AWS

Petya Ransomware

Petya ransomware derived its name from the movie, Golden Eye, a 1995 James Bond flick. It was first discovered in 2016, as member of encrypting ransomware. Its primary targets are Microsoft Windows-based systems. It prevents Windows from booting by corrupting the master boot record and encrypts a victim’s hard drive’s file system through the [...]

2017-08-22T21:10:21+05:30August 22nd, 2017|Server Administration, Server Security|0 Comments

Managing WordPress Using WP-CLI

Every wordpress user loves wordpress’ admin interface. Entire wordpress installation can be managed in one interface. Plugin installation, configuration, updates etc can all be managed from one single interface. What if there is a command line interface for the WP admin functions? That is what exactly provided by WP-CLI. Users with shell skills will love [...]

2017-01-30T14:06:17+05:30October 29th, 2016|Server Administration, Web Applications|0 Comments

Configure Voipfone in Ubuntu 14.04 LTS using Asterisk 11

Few days back, I created an account at voipfone.co.uk for VOIP service. I chose Asterisk 11 as it is stable and comes with Ubuntu 14.04 LTS. The installation and configuration of voipfone service in Asterisk is relatively easy. Install asterisk apt-get install asterisk All configuration files of asterisk are in /etc/asterisk directory. The important files [...]

2017-01-30T14:07:10+05:30October 27th, 2016|Server Administration|0 Comments

Dirty COW Vulnerability ( CVE-2016-5195 )

A nine year old local privilege escalation vulnerability has been reported in linux kernel. All linux distribution are reportedly affected by this. In redhat/centos 5, 6 and 7, the way to identify the affected or unpatched system is like below. $ wget https://access.redhat.com/sites/default/files/rh-cve-2016-5195_1.sh $ bash rh-cve-2016-5195_1.sh An official version of the patch is not yet [...]

2019-10-09T11:45:03+05:30October 22nd, 2016|Server Administration, Server Security|0 Comments

Reset/Re-sync MySQL Master Slave Replication

Master/Slave Concept: While hosting a website, the database is of utmost importance as a small glitch in the database can make or break the whole website. Hence, we look for different ways to keep the database secured. One of the common methods used is the MySQL master-slave replication. The Master-slave data replication allows data to [...]

2017-01-31T12:02:59+05:30October 10th, 2016|Server Administration|Comments Off on Reset/Re-sync MySQL Master Slave Replication

Systemd NOTIFY_SOCKET Vulnerability

A systemd vulnerability has been reported which freezes systemd calls. Systemd has been widely adopted in latest Linux Distributions like Redhat Enterprise Linux, Ubuntu, Debian, SUSE Linux Enterprise Servers. Systemd is the daemon that manages other daemons in Linux. A zero sized message received in systemd notification socket will hang its pause system call. It [...]

2017-01-30T17:09:09+05:30October 8th, 2016|Server Administration, Server Security|Comments Off on Systemd NOTIFY_SOCKET Vulnerability

Apache JMeter

Apache Jmeter is an open source application which is used for monitoring apache web server working and its performance. It is based upon java application with graphical interface and it was developed by Stefavno Mazzocchi of the Apache software foundation. Performance means testing a server or web application against heavy loads, several and simultaneous user [...]

2017-01-31T12:04:27+05:30July 21st, 2016|Server Administration|Comments Off on Apache JMeter